Apparatus and method for assessing the integrity of analog-digital converter

An apparatus for determining integrity of an electrical device in a vehicle, the apparatus comprising:

• a high voltage measuring circuit for receiving a high voltage signal and including at least one stressed resistor for reducing the high voltage signal into a suitable voltage signal;
• an analog-to-digital converter (ADC) for receiving the suitable voltage level to perform a measurement thereof that is indicative of the high voltage signal in a normal operation mode;
• a controller configured to:
• apply a calibrated voltage to the at least one stressed resistor in a calibration mode;
• and
• calculate a resistance value of the at least one stressed resistor based on applying the calibrated voltage to the at least one stressed resistor to determine if the at least one stressed resistor is in a stressed state.

A method for determining integrity of an electrical device in a vehicle, the method comprising:

• receiving a high voltage signal;
• reducing the high voltage signal via at least one stressed resistor to provide a suitable voltage signal;
• digitally converting the suitable voltage level to perform a measurement that is indicative of the high voltage signal in a normal operation mode;
• applying a calibrated voltage to the at least one stressed resistor in a calibration mode;
• and
• calculating a resistance value of the at least one stressed resistor based on applying the calibrated voltage to the at least one stressed resistor to determine whether the at least one stressed resistor is in stressed state.